/****************************************************************************
 * Copyright 2009 Huascar A. Sanchez                                        *
 *                                                                          *
 * Licensed under the Apache License, Version 2.0 (the "License");          *
 * you may not use this file except in compliance with the License.         *
 * You may obtain a copy of the License at                                  *
 *                                                                          *
 *     http://www.apache.org/licenses/LICENSE-2.0                           *
 *                                                                          *
 * Unless required by applicable law or agreed to in writing, software      *
 * distributed under the License is distributed on an "AS IS" BASIS,        *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
 * See the License for the specific language governing permissions and      *
 * limitations under the License.                                           *
 ****************************************************************************/
package com.gotobject.filter.spi;

import com.gotobject.filter.predicate.Predicate;
import com.gotobject.filter.spi.Committed.Context;
import static com.gotobject.filter.spi.Committed.Context.ANY;
import static com.gotobject.filter.spi.Committed.Context.SELECT;
import static com.gotobject.filter.spi.Committed.Context.WHERE;

import java.lang.annotation.Annotation;

/**
 * @author huascar.sanchez@gmail.com (Huascar A. Sanchez)
 */
public class ContextFluency {
	private Context select;
	private Context where;
	private Context any;

	public ContextFluency(){
		select = SELECT;
		where  = WHERE;
		any    = ANY;
    }


	private static <T extends Annotation> T getAnnotation(Predicate<?> cond, Class<T> annotation){
		return cond.getClass().getAnnotation(annotation);
	}

    public boolean isSelect(Predicate<?> cond){
		final Committed committed = getAnnotation(cond, Committed.class);
		return committed != null && ((committed.to() == select) || (committed.to() == any));
	}

    public boolean isWhere(Predicate<?> cond){
		final Committed committed = getAnnotation(cond, Committed.class);
		return committed != null && ((committed.to() == where) || (committed.to() == any));
    }
}
